/*
* Copyright 2020 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.cloud.examples.storage.objects;
// [START storage_set_metadata]
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.HashMap;
import java.util.Map;
public class SetObjectMetadata {
public static void setObjectMetadata(String projectId, String bucketName, String objectName) {
// The ID of your GCP project
// String projectId = "your-project-id";
// The ID of your GCS bucket
// String bucketName = "your-unique-bucket-name";
// The ID of your GCS object
// String objectName = "your-object-name";
Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
Map<String, String> newMetadata = new HashMap<>();
newMetadata.put("keyToAddOrUpdate", "value");
Blob blob = storage.get(bucketName, objectName);
// Does an upsert operation, if the key already exists it's replaced by the new value, otherwise
// it's added.
blob.toBuilder().setMetadata(newMetadata).build().update();
System.out.println(
"Updated custom metadata for object " + objectName + " in bucket " + bucketName);
}
}
// [END storage_set_metadata]
